Re: Something strange with the Perspective Transform?

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Hi Richard

Thank you for your answer. It's true that Direct3D uses a left hand
system while e.g. OpenGL uses a right hand but that doesn't explain why
the matrix is transposed.

/Ola

On Thu, 12 Jul 2007 09:05:24 -0700, Richard [Microsoft Direct3D MVP]
wrote:

[Please do not mail me a copy of your followup]

Ola Theander <ola.theander@xxxxxxxxxxxx> spake the secret code
<pan.2007.07.12.14.38.59.964814@xxxxxxxxxxxx> thusly:

To answer my own question; it seems like Direct3D uses a transposed
projection matrix compared e.g. to OpenGL, most literature and
documentation. Why Direct3D does this is still an open question.

Direct3D uses a left-handed coordinate system. OpenGL uses a
right-handed coordinate system.

.

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